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CPU & Computer Architecture | LowLevelCraft

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CPU & Computer Architecture

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CPU & Computer Architecture

Comprehensive curriculum covering digital logic, CPU design, instruction sets, memory hierarchy, pipelining, and SIMD. Learn how modern processors work at the hardware level and write performance-critical code.

~2295 Minutes 51 Challenges 6 Subtracks

Deep Dive

CPU Pipelines and Why Your Code Runs Out of Order

The CPU does not execute your instructions in the order you wrote them. It reorders them to keep every execution unit busy, and if your code assumes sequential execution, it will be wrong in ways you cannot see.

8 min read·Read article →

Subtracks (6)

Digital Logic & Boolean Algebra

Everything is built from NAND gates — prove it. Master the fundamentals of digital logic design, from basic gates to arithmetic logic units.

CPU Design

Understand what happens inside your processor. Build a complete CPU from simple fetch-decode-execute to advanced pipelining with hazard detection.

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Difficulty Progression

Easy6

Med24

Hard21

Inflection Point21 hard tasks ahead — take your time and refer to the article deep dives for context.

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Instruction Set Architecture

Learn x86, ARM, and RISC-V at the spec level. Understand instruction encoding, calling conventions, and architectural trade-offs between CISC and RISC designs.

8 tasks

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Memory Hierarchy

Understand cache memory, TLB, page tables, and NUMA architectures. Learn how to write cache-friendly code and optimize memory access patterns.

Pipelining & Out-of-Order Execution

Learn how modern CPUs achieve high performance through pipelining, branch prediction, instruction-level parallelism, and out-of-order execution. Understand the trade-offs and security implications of speculative execution.

SIMD & Vectorization

Learn SIMD (Single Instruction, Multiple Data) programming with SSE2, AVX2, and auto-vectorization. Understand when to use SIMD for performance gains in image processing, string operations, and mathematical computations.